Exclude tables (and/or their date) that match a regexp

Consider the following scenario: you have only one, but otherwise unlimited database (unlimited storage, unlimited number of tables, etc.) You are running several instances of Drupal, possibly with different core versions, where the instances have their own table name prefix. You are developing some tests, and you always forget to clean up the mess afterwards. One of your instances needs to be deployed to its final place (eg. on a customer's server). You leap for backup_migrate.module, but you're facing with a list that takes half a week to even scroll down to the end, and several hundred tables should be excluded from your backup, with different table prefixes. Now what?

Now apply this patch, enter a regexp ((d5_|d7_simpletest).*) that matches the table names you want to exclude (and/or enter another regexp that matches the table names you don't want their data), click that button, and voilá: you won't have that pesky d5_..., d7_simpletest..., d6foo_... and alike tables.

(I'm attaching two patches, one for backup_migrate-6.x-1.2 and one for 6.x-2.2: I was working offline on the holidays and I've noticed the 2.2 version only when I've finished with the 1.2 patch. Take the one you're using.)